Blocks vesting accounts from delegating their tokens to validators.

cosmos_block_vested_account_staking.go

package decorators

// reference: https://x.com/gtx360ti/status/1760400114361725279
// Stratos VC sells $1,609,926 by staking their "locked" tokens ($DYM), earnings rewards on these vested funds
// and selling the rewards. Recouping their entire investment within 3 weeks of mainnet despite not touching
// any of the locked funds.

import (
	"fmt"

	authkeeper "github.com/cosmos/cosmos-sdk/x/auth/keeper"
	vestingtypes "github.com/cosmos/cosmos-sdk/x/auth/vesting/types"
	stakingtypes "github.com/cosmos/cosmos-sdk/x/staking/types"

	sdk "github.com/cosmos/cosmos-sdk/types"
)

// ante handler decorator
type MsgFilterDecorator struct {
	AuthKeeper authkeeper.AccountKeeper
}

// AnteHandle performs an AnteHandler check that returns an error if the tx contains a message that is not allowed
func (mfd MsgFilterDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (newCtx sdk.Context, err error) {
	if mfd.isInsiderTryingToDumpOnRetailWithQuoteLockedFundsUnQuote(ctx, tx.GetMsgs()) {
		currHeight := ctx.BlockHeight()
		return ctx, fmt.Errorf("tx contains unsupported message types at height %d", currHeight)
	}

	return next(ctx, tx, simulate)
}

// block from delegating with vesting accounts.
func (mfd MsgFilterDecorator) isInsiderTryingToDumpOnRetailWithQuoteLockedFundsUnQuote(ctx sdk.Context, msgs []sdk.Msg) bool {
	for _, msg := range msgs {
		for _, signer := range msg.GetSigners() {
			accType := mfd.AuthKeeper.GetAccount(ctx, signer)

			isVesting := false
			switch accType.(type) {
			case *vestingtypes.ContinuousVestingAccount:
				isVesting = true
			case *vestingtypes.DelayedVestingAccount:
				isVesting = true
			case *vestingtypes.PeriodicVestingAccount:
				isVesting = true
			}

			// TODO: nested Authz msg check here

			if isVesting {
				if _, ok := msg.(*stakingtypes.MsgDelegate); ok {
					return true
				}
			}
		}
	}

	return false
}

Add a vacc.GetVestingCoins(sdkCtx.BlockTime()).IsZero() check instead of blank disable from https://github.com/alexanderbez/novestingyield/tree/main